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CONCENTRATIONS (Details)
$ in Millions
12 Months Ended
Jun. 30, 2023
CNY (¥)
Jun. 30, 2022
CNY (¥)
Jun. 30, 2021
Jun. 30, 2023
USD ($)
Jun. 30, 2023
HKD ($)
China          
CONCENTRATIONS          
Cash was on deposit at financial institutions ¥ 45,500,000 ¥ 20,300,000   $ 6.3  
Maximum insured bank deposit | ¥ 500,000        
Unprotected cash held in banks 40,000,000.0 17,800,000   5.5  
Hong Kong          
CONCENTRATIONS          
Cash was on deposit at financial institutions 240,300,000 297,200,000   33.1  
Maximum insured bank deposit | $         $ 500,000
Unprotected cash held in banks ¥ 238,800,000 ¥ 296,800,000   $ 32.9  
China National Petroleum Corporation | Customer concentration | Sales revenue          
CONCENTRATIONS          
Concentration risk, percentage 50.00% 39.00% 43.00%    
China National Petroleum Corporation | Customer concentration | Accounts Receivable          
CONCENTRATIONS          
Concentration risk, percentage 49.00% 29.00% 27.00%    
SINOPEC | Customer concentration | Sales revenue          
CONCENTRATIONS          
Concentration risk, percentage 28.00% 22.00%      
SINOPEC | Customer concentration | Accounts Receivable          
CONCENTRATIONS          
Concentration risk, percentage 22.00% 13.00%      
Another Customer | Customer One | Sales revenue          
CONCENTRATIONS          
Concentration risk, percentage     32.00%    
Another Customer | Customer One | Accounts Receivable          
CONCENTRATIONS          
Concentration risk, percentage   19.00% 11.00%    
Another Customer | Customer Two | Sales revenue          
CONCENTRATIONS          
Concentration risk, percentage     31.00%    
Another Customer | Customer Two | Accounts Receivable          
CONCENTRATIONS          
Concentration risk, percentage   14.00% 10.00%    
Another Customer | Customer concentration | Sales revenue          
CONCENTRATIONS          
Concentration risk, percentage 10.00%        
Another Customer | Customer concentration | Accounts Receivable          
CONCENTRATIONS          
Concentration risk, percentage 14.00%